联合硅藻土与PAC强化混凝处理含藻微污染原水

许小洁; 吴纯德; 汪清; 董琪; 梁炜麟

华南理工大学环境科学与工程学院工业聚集区污染控制与生态修复教育部重点实验室，广州 510006

北京大学环境科学与工程学院，北京 100871

天津大学环境科学与工程学院，天津 300072

基金项目:

国家自然科学基金资助项目（51078148）

中图分类号: X703.5

Enhanced coagulation of slightly polluted algae-containing surface waterwith combination of PAC and diatomite

The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters， Ministry of Education， College of Environmental Science and Engineering， South China University of Technology， Guangzhou 510006，China

College of Environmental Science and Engineering， Peking University， Beijing 100871，China

School of Environment Science and Technology， Tianjin University， Tianjin 300072，China

Fund Project:

摘要: 研究了联合硅藻土与聚合氯化铝（PAC）强化混凝对原水中藻类、溶解性有机物以及重金属离子的去除效果。结果表明，硅藻土的投加可以有效地改善絮体的沉降性能，增强藻类的混凝沉淀去除效率，PAC投加量为30 mg/L时，投加0.1 g/L硅藻土，叶绿素a去除率由82.5%提高到95.9%。该强化混凝过程使原水中溶解性有机物特别是大分子有机物和重金属离子的去除率有所上升。PAC投加量为30 mg/L，硅藻土投加量为1.5 g/L时，重金属Cu、Pb和Cd的去除率分别达到57.5%、83.7%和22.2%。

Abstract: The removal efficiencies of algae， dissolved organic matter and heavy metals from the slightly polluted algae-containing surface water by the combination of PAC and diatomite were investigated. The slightly polluted algae-containing surface water was treated by polyaluminium chloride (PAC) combining diatomite. The removal efficiencies of algae， dissolved organic matter and heavy metals were investigated. Results show that diatomite can improve floc settleability and algae removal efficiency effectively. The Chl-a removal rate was risen from 82.5% to 95.9% with 30 mg/L PAC combining 0.1 g/L diatomite. The removal rates of dissolved organic matter， especially the high molecular weight organic matter， and heavy metals can also be raised by the enhanced coagulation. At the diatomite dosing rate of 1.5 g/L， the removal efficiency of Cu， Pb and Cd reached 57.5%， 83.7% and 22.2%， respectively.

Key words:

联合硅藻土与PAC强化混凝处理含藻微污染原水

1. 华南理工大学环境科学与工程学院工业聚集区污染控制与生态修复教育部重点实验室，广州 510006

2. 北京大学环境科学与工程学院，北京 100871

3. 天津大学环境科学与工程学院，天津 300072

收稿日期: 2010-09-21

基金项目:

国家自然科学基金资助项目（51078148）

关键词:

Enhanced coagulation of slightly polluted algae-containing surface waterwith combination of PAC and diatomite

1. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters， Ministry of Education， College of Environmental Science and Engineering， South China University of Technology， Guangzhou 510006，China

2. College of Environmental Science and Engineering， Peking University， Beijing 100871，China

3. School of Environment Science and Technology， Tianjin University， Tianjin 300072，China

Received Date: 2010-09-21

Fund Project:

Keywords:

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